AsposeFontConvertToTTF | API Solution for Javascript

How to convert the font into TTF format?

1. Create a ‘FileReader’.
2. Call the AsposeFontConvertToTTF function.
3. The name of the resulting file is set, in json.fileNameResult.
4. Next, if the json.errorCode is 0, then you can get links to the result files. If the json.errorCode parameter is not equal to 0 and, accordingly, there will be an error in your file, then information about such an error will be contained in the json.errorText.
5. As a result, the DownloadFile function generates a link and allows you to download the resulting file to the user’s operating system.

Below is the sample which converts font from EOT to TTF format.

  var fEOT2TTF = function (e) {
    const file_reader = new FileReader();
    file_reader.onload = (event) => {
      const json = AsposeFontConvertToTTF(event.target.result, e.target.files[0].name, Module.FontType.OTF);
      if (json.errorCode == 0) document.getElementById('output').textContent = json.fileNameResult;
      else document.getElementById('output').textContent = json.errorText;
      DownloadFile(json.fileNameResult, "font/ttf");
    }
    file_reader.readAsArrayBuffer(e.target.files[0]);
  }

Web Worker example:

  /*Create Web Worker*/
  const AsposeFontWebWorker = new Worker("AsposeFontforJS.js");
  AsposeFontWebWorker.onerror = evt => console.log(`Error from Web Worker: ${evt.message}`);
  AsposeFontWebWorker.onmessage = evt => document.getElementById('output').textContent = 
    (evt.data == 'ready') ? 'library loaded!' :
      (evt.data.json.errorCode == 0) ? `Result:\n${DownloadFile(evt.data.json.fileNameResult, "font/ttf", evt.data.params[0])}` : `Error: ${evt.data.json.errorText}`;

  /*Event handler*/
  const fEOTtoTTF = e => {
    const file_reader = new FileReader();
    file_reader.onload = event => {
      /*Convert a OTF fonts to TTF and save - Ask Web Worker*/
      AsposeFontWebWorker.postMessage({ "operation": 'AsposeFontConvertToTTF', "params": [event.target.result, e.target.files[0].name, 'Module.FontType.OTF'] }, [event.target.result]);
    };
    file_reader.readAsArrayBuffer(e.target.files[0]);
  };

  /*Make a link to download the result file*/
  const DownloadFile = function (filename, mime, content) {
      mime = mime || "application/octet-stream";
      var link = document.createElement("a"); 
      link.href = URL.createObjectURL(new Blob([content], {type: mime}));
      link.download = filename;
      link.textContent = filename;
      link.title = "Click here to download the file";
      document.getElementById('fileDownload').appendChild(link);
      document.getElementById('fileDownload').appendChild(document.createElement("br"));
  }

See Also

• function AsposeFontConvert
• enum FontType